However both can be true, the headphone out may use bootstrapping, which for AC could give it a wider voltage swing._________________Jan
(yawning shifts perceived pitch, making things more interesting)

Oh – that may be true if you are only amplifying the signal level within the patch. IIRC, you can only get a maximum of +/- 256 “Clavia units” (4X +/- 64 units) to the Output module without clipping. But, the output bus has some extra headroom and can allow patches with more than one Output module set to max. I’m fairly certain that I used more than one Output module to push the output bus to its max.

The same (maximum of +/- 256 “Clavia units” to the Output module) is true for the G2, but the G2 Output module has a +6dB pad switch that allows you to boost the signal level on the output bus to near the clipping level of the system.

[EDIT: to correct spelling]_________________variceLast edited by varice on Sun Feb 02, 2014 10:13 pm; edited 1 time in total

With a voltage swing > 6V you would have 6 octaves without any signal treatment ... not sure how linear it would be .. also not sure how many bits there are, but at least 15 usable ones I'd guess or > 30,000 values, so about 500 steps / Volt -> 500 steps / octave or one step would be about 2.4 cent .. which would be pretty accurate.

All this is speculative of course _________________Jan
(yawning shifts perceived pitch, making things more interesting)

:
With a voltage swing > 6V you would have 6 octaves without any signal treatment ... not sure how linear it would be .. also not sure how many bits there are, but at least 15 usable ones I'd guess or > 30,000 values, so about 500 steps / Volt -> 500 steps / octave or one step would be about 2.4 cent .. which would be pretty accurate.

All this is speculative of course

2.4 cents resolution is pretty good..and that was going to be my next question the + - thing..so yeah 6 octaves..nice !

If you own for example the Moog CP-251 you can use the inbuilt attenuators to adjust the voltage.

I'm fairly new to this whole CV business - Would what klangumsetzer suggests - boosting the voltage level externally - allow for accurate tracking ?

Cheers

Yes, the 4 Input Mixer of the Moog CP-251 can be used to amplify and scale the DC voltage level if you need more range than the G1 can produce, but it appears to be limited to a max output range of +/- 5V. The Attenuator controls only reduce the signal level, and of course, you can always reduce the signal level within the G1 patch if necessary._________________varice

If you own for example the Moog CP-251 you can use the inbuilt attenuators to adjust the voltage.

I'm fairly new to this whole CV business - Would what klangumsetzer suggests - boosting the voltage level externally - allow for accurate tracking ?

Cheers

Yes, the 4 Input Mixer of the Moog CP-251 can be used to amplify and scale the DC voltage level if you need more range than the G1 can produce, but it appears to be limited to a max output range of +/- 5V. The Attenuator controls only reduce the signal level, and of course, you can always reduce the signal level within the G1 patch if necessary.

According to the specs in the Moog CP-251 Manual, the Mixer section maximum output range is +/- 5VDC, so in that case, you could only boost the G1 output signal to +/- 5VDC. If you need a greater signal range than that, you would need to use some other DC amplifier. I hope that explaination of the issue is a bit more clear, but feel free to ask again if I have failed._________________varice

According to the specs in the Moog CP-251 Manual, the Mixer section maximum output range is +/- 5VDC, so in that case, you could only boost the G1 output signal to +/- 5VDC. If you need a greater signal range than that, you would need to use some other DC amplifier. I hope that explaination of the issue is a bit more clear, but feel free to ask again if I have failed.

If you own for example the Moog CP-251 you can use the inbuilt attenuators to adjust the voltage.

I'm fairly new to this whole CV business - Would what klangumsetzer suggests - boosting the voltage level externally - allow for accurate tracking ?

I wonder if the confusion is caused by us having a different definition of what “boosting” a DC signal means.

dashwood, when you ask if you could boost the signal, what is the result that you want; to amplify the range from like -3V/+3V to -5V/+5V; or to offset (shift) the range up from like -3V/+3V to 0V/+6V? or something else?_________________varice

sorry for the confusion: To boost the signal I use the CP-251 in compination with the powered EP-2 expression pedal.

Yep,thanks klangumsetzer, so does the EP2 boost the signal further..or are you just using it as a controller?

More to the point how have you found using CV from G1 in general !?..I'd be v interested to hear your experience...any issues?..how accurate and consistent have you found the tracking?

Quote:

I wonder if the confusion is caused by us having a different definition of what “boosting” a DC signal means.

dashwood, when you ask if you could boost the signal, what is the result that you want; to amplify the range from like -3V/+3V to -5V/+5V; or to offset (shift) the range up from like -3V/+3V to 0V/+6V? or something else?

Thanks varice, well my original question was regarding amplifying the range and that's clear now, but funnily enough the way you responded initially re:the CP251 bought *that* question to mind too !

I wonder if the confusion is caused by us having a different definition of what “boosting” a DC signal means.

dashwood, when you ask if you could boost the signal, what is the result that you want; to amplify the range from like -3V/+3V to -5V/+5V; or to offset (shift) the range up from like -3V/+3V to 0V/+6V? or something else?

Thanks varice, well my original question was regarding amplifying the range and that's clear now...

O.K. That’s good. My reply to your question about the CP-251 was mainly to make the point that yes it can amplify the G1 output range, but only by a small amount (only to a maximum range of -5V to +5V according to the manual)._________________varice

O.K. That’s good. My reply to your question about the CP-251 was mainly to make the point that yes it can amplify the G1 output range, but only by a small amount (only to a maximum range of -5V to +5V according to the manual).

Yep,thanks Varice...but..that's still 10 octaves right?!

Quote:

the moog ep-2 pedal can boost the voltage from 0-5 V when it is plugged into any of the powered inputs of the cp-251.

i have not used the g1 yet as cv scource. i own a little phatty with cv output mod which i use in conjuction with 2 cp-251, ep-2 and three moogerfoogers.

Ok,thanks for the info Klang.

Has anyone tried to use it as a serious CV source yet?..really interested to hear experiences.

O.K. That’s good. My reply to your question about the CP-251 was mainly to make the point that yes it can amplify the G1 output range, but only by a small amount (only to a maximum range of -5V to +5V according to the manual).

Yep,thanks Varice...but..that's still 10 octaves right?!...

Yes of course, if your VCO(s) are 1V/octave and can use a bipolar pitch CV of -5V to +5V._________________varice

I haven't read this thread in a while and seeing the latest post have to add that it is pretty trivial to make a fixed gain amplifier to boost the headphone output. You could also add offset to make it all positive (useful for making gate or clock signals).

I would think if resolution + range was the most important thing to you, you cold invert and combine both the left and right outs into one signal and make a patch to take advantage of that, but it seems the resolution seems good enough for most uses.

Modules on the modular could easily compensate for levels and quantize them to make it work easier. You could use the audio outs and envelope follow them on the modular and make less critical CVs if needed._________________James Husted, Designer
Synthwerks, LLC
www.synthwerks.com

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